Steam-trap.



idf fiTnp STATES PATENT OFFICE.,

\\'ILLI.\.\I GIBSON, OIfhlUSFA'IINIG, IOlYA, ASSIGXOIt 'VITO AMERICAN GIBSON HEATER COMPANY. OF CHICAGO, ILLINOIS, A CORPORA-` TIOY OF ARIZONA TERRI'IORY.

STEAM-TRAP.

SPECIFXCATION forming part of Letters Patent No. 781,647, dated February 7, 1905.

Application filed September 18,1903. Serial No. 173,365.

This invention relates more particularly to i a drain-trap adapted to permit` 'the escape of water ot' condensation from any steam-containing chamber while retaining the steam therein.

iioretolore great diiiiculty has .been experienced in drainiin;l the water of condensation 2f muomatienlly from the steam-chambers, while Y rino the steam therein, anti of the many devices tor the purpose none have heen found that wornd work under all conditions and sutlieienzly separate the water from the steam.

is. Inrlhermm'e. many of the devices heretofore used, owir up: the multiplicity of parts, are iikeiy to soon getout of order, with the result ol' steam leakage and consequent loss.

'the ohjeet oi this invention is to provide a strong, simple, and cheaply-constriicted trap operating; expansi 'ely to close the discharge port or passage att-er the water has been discharged therefrom and operating by contraction to open said ports when a suiticient if, amount ot' water has gathered in The trap.

'the invention consists in the matters herei 'ter desti-ri ed, and more fully pointed out le'iined in the appended claims.

in the d rz'uvings` Figure l is a top plan view,

,'J partly broken, showing' the operating uicchanism and with the upper portion ot' the trapsing removed. Fig'. i a central longitunal section taken on l. Fig. 3 is a transverse section taken tu line 8 of Fig. 2. Fig. t

connection of the expansion-bur with the trap casing.

As shown m said drawings, A indicates as is an enlarged detail oi' the adjusting a whole the bottom halt ot' the trap-casing and comprising a hase 1/ and inlegral side haliwalls fr' and end walls ai. Said side and end walls are 'rovided with outwm'dly-directed llanges fr. at the top and ground Io afford a joint with the corresponding' llnnges 1 of the lop casing-section A', which is likewise provided with integral end and side walls and together with the bottom section providesa relatively large receptacle to receive the water ot condensation. integral legs B l' are provided at each end of the easing-sections A and A', shaped to all'ord attachment hy hultine' or otherwise with any rigid support, such as the frame (indicated hy W) of the system wilh which the trap is desired to he used.

Connected in one end of the hase-section A is a steam-inlet pipe C, which opens into the end oi' the trap through a suitable port r, as shown, in the hottom ol: the trapand through which the free Iiow oIl steamer the water condensed therefrom is permitted. Au outletport C is provided near the middle ot' the hottoin A of the casing', which, as shown, is narrow transversely ot' said section, hut extended longitudinally thereof and is in open communication with anoutlet-passage e', lending' louejitudinallyr through the hase of the trap-section A and connuunicatirre,` at its ends with a discharge-pipe r2. The bottom of said trapsection Av about the outlet-port O/ is slightly raised and faced to atord a seat/l for a sliding block or plate D, which is also faced on its under surface and oi' a length and width greater than the like dimensions of said port, so that in one position said hlock or plate entirely covers and closes said discl'iarge-port and in its retracted or partly-retracted position opens said port and permits the escape ol' water therethrough,ali'ordnggin eit'ect,a slide-value.

Said block or plate is actuated hy means of an expansion-har E, which is secured at one end of the lower casing-section A hy a holte. The expansion-intr is usually constructed of brass. bronze, or any other metal which expands greatly when heated and is curved inwardly toward the port ,(ll and provided centrally with a rivet (Z, which loosely ronnects the plate or block l) therewith. At the otherend of the casing-section an internally-tln'eaded sleeve c' extends through an aperture in the end wall and is provided at its inner end with a flange ment with the nut c, which hears against the outer side of said end wall a, and is provided with a set-screw ,f", which engages the thread of said sleeve, so that said sleeve can ne turned hy the rotation of said nut. Agthreaded bolt ff. provided with an eye on itsinner endnhas threaded engagement in said sleeve, and a jamnut ff is provided on the outer end thereof to hold the same inadjusted position. The end of said har E is provided with an apertured knuckle r, which engages on each side ot the head ol the eye-boltand through which a pin or rivet is secured, yieldingly connecting' the end of said har with said eyebolt and acting to hold said eyeholt from turning.

'lhe operation is as follows: lNhen the-device is assembled, the expansion-bar E is adjusted by means or' the eyebolt E at the endt thereof, the pressure or' the same against said har bowing the same slightly toward the discharge-port B', so that when the same becomes heated hy steam admitted through the inlet-port the expansion of said bar increases the curvature thereof and carries the block or plate D forwardly, closing the dischargeport. Said block slides on the seat d, surrounding said port, as yis usual with a slidevalve, said seat or hlocli mutually grinding or wearingleach other to a close lit. i/Vhen said aperture is completely closed, the Water ot' condensation from the system with which the trap is connected Hows into the same,l gradually lilling or partly lillino' the casing, and as there is' no further circulation of steam, owing to said outlet-ports being closed, the water soon hecoincs cooled hy'radiation 'from the trap-casing, which afi'oidsa large radiation-surface, and the-expansion-har li contracts, again opening' the outlet-'port and allowing' the discharge olv the water therethrough. rilhe llow will obviously continue until the water is all drained from'the'trap and the How oli' steam therethrough started. The inlet of hot steam into the trap, however,

l quickly expands the har, and almost immediately following the discharge of the water fromthe trap the port is again closed, as hefore described. So long as water of a lower temperature than the steam remains to loe discharged through the port the port necessarily remains open or partly open. @laviously by the construction described said bar E can he adjusted to quickly close the port at any given temperature to open or partly open at any lower temperatur-mutans enabling the device to be employed for many different purstruction may'he varied and, it preferred, the cxpansible elements herein descriluid as a har may assume many dil'erent l'orxns and may be differently positioned than herein shown and described without departing' from the principles of my invention. i

.l claim as my invention-- l. A trap of the class described comprising .a closed recel'itacle provided with an inlet and an outlet port, a slide-valve closure adapted to cover the outlet-port.l expanslhle means con- .necting the valve-closure with the receptacle and acting by change or' temperature to move thev closure Ito and from the outlet-port and an adgustmg-bolt l'nnged thereon auf; engaged Yopening therein, slide-valve closure controlling said outlet-port, c connecting said slide-vali* and acting to open and close at predetermined temperature' ad meai'is eugaging thereon adapted to adinst the curvature of said bar and to adjust the valve-closure with respect to .sz-d outlet.

il. A trap of the ci; van vupper and a lower in ceptacle, an inlet-poriJ in one e an outlet-port, plane seat outlet-port, a slidahle 'e pmi' the outlet-port. a enrvcu the casing and looselyY con l, plate and acting h v e and contraction to V close and open nd adjusting means hinged on said rod adrig-)ted to adjust said plate with respent to the outlet-port.

A trap of the described comprising an upper and a lower hal ng adarited to be rigidly secured together to aiiord a closed receptacle, an inlet-portie one ci" saii'l sections, an Outlet-port, a plane seat surrounding said outlet-port, a slida-ble plate pi'isitioned to close the outlet-port, a carved expansion-rod attached upon the casing and loosely connected with said plate and acting by nieans of expansion and contraction, to close the ports and adjusting means hinged. to the end of said rod and adapted to regulate the curvature thereof.

6. A steam-trap comprising' a closed receptacle, an inletport adapted for connection with a steam system, an outlet-port for the water of condensation, a slide-valve closure said sections, founding said l to close l ed upon Hai-fel with said poses than that herein described, and, furthercontrolling said outletport, a bent bar of more, 1t is obvious that many details of conhighly-expansihle material rigidly connected i l l i .inscribed comprising tit-casing adapted to be. rigidly secured together to all'ord a closed re- ITS at one end with the casing and intermediate its ends with said slide-valve closure and acting by expansion and contraction thereof to operate said valve and an adjusting-bolt hinged :rt the opposite end of said bar and adapted to adjust the valve-closure with respect to said outlet-port.

7 The combination with a, closed casing, of 1th inlet-port opening thereinto and adapted for connection with e fluid-containing,- system, a discharge-port, a slide-Valve closure controlling said discharge-port, an adjustable curved bar acting to control said valve and rotative means for adjustingthe curvature thereof.

8. 'lhe combination with a closed metallic casing provided with :1n-.inlet and Aan outlet port, of a slide-valve controlling said outletport, a highly-expansiole curved bar connected at one end with the casing, a slide-valve C. W. HiLLs, WV. W. YVITHENBURY. 

